SwiftRational

A small library implementing support for rational numbers in Swift, as the Rational type.

WARNING: This is unmaintained proof-of-concept software; don't use it for anything that actually matters. Try something like Xiaodi Wu's NumericAnnex library instead.

Features

• Construct rationals from integers, doubles, integer literals, double literals, or a numerator and denominator
• Rationals are always in irreducible form
• Value semantics, just like the standard numeric types you know and love
• +, -, *, /, ==, <, and all other comparison operators
• Conforms to Printable - print them out or stringify them
• Conforms to Hashable - use as dictionary keys
• - prefix operator to negate
• inverse property to get the inverse
• Conforms to AbsoluteValuable; get the absolute value using abs
• Perform overflow-checked arithmetic using addWithOverflow, subtractWithOverflow, multiplyWithOverflow, and divideWithOverflow

Instructions

1. Clone the repository
2. Copy the file rational.swift into your project, or add the framework
3. Enjoy using rational numbers

Plans

• Unit tests
• % and remainderWithOverflow support
• Get demo project to stop giving me cryptic warnings (note that these warnings won't affect your usage of the code)

Pull requests, bug reports, and any other feedback are all welcome.

License

SwiftRational © 2015 Austin Zheng, released as open-source software subject to the MIT license.